Issue for this PR

N/A

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

• Added resolveThemeVariantV2 to generate v2 tokens from theme palettes at runtime
• Added static mapping from v2 semantic tokens → v2 primitive/color tokens
• Generate grey + hue ramps from each theme’s palette; text tokens generated separately
• Inject v2 CSS vars in ThemeProvider alongside v1 (v1 resolve unchanged)
• Added per-theme v2Overrides — OC-2 is fully overridden, Matrix has targeted overrides
• Added dev script build-oc2-v2-overrides.ts to regenerate OC-2 overrides

How did you verify your code works?

• Visually compared every theme to current desktop themes (in light/dark mode)
• Ran type checks locally (bun turbo typecheck)

Screenshots / recordings

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

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